丁志敏,方建飞,梁博,阎颖

• 1:大连交通大学材料科学与工程学院

摘要(Abstract)：

采用金相分析方法研究了V-Nb和V-Nb-Ti微合金化钢在不同加热温度下原始奥氏体晶粒长大的规律,并在此基础上,对其奥氏体晶粒生长动力学方程进行了数学回归分析。结果表明:随奥氏体化温度的升高,两种微合金化钢的奥氏体晶粒尺寸均呈现增加的趋势,其不均匀因子则呈现出先增大后减小的趋势。但V-Nb-Ti微合金化钢的奥氏体晶粒尺寸和不均匀因子的变化趋势均比V-Nb微合金化钢的平缓。V-Nb和V-Nb-Ti微合金化钢的奥氏体晶粒长大动力学方程均符合Beck方程。后者的奥氏体晶粒长大激活能20 kJ/mol稍大于前者19 kJ/mol。

关键词(KeyWords)： 微合金化钢;奥氏体晶粒;长大动力学;混晶

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 丁志敏,方建飞,梁博,阎颖

DOI: 10.13289/j.issn.1009-6264.2013.s1.020

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